Example

A wave is y = 2sin(4t). Find out its amplitude.

Solution:

Given: wave equation y = 2sin (4t)

using the amplitude formula,

x = A sin(ωt + ϕ)

When compared to the wave equation,

A = 2

ω = 4

ϕ = 0

As a result, the wave’s amplitude is 2 units.